Original Research Paper
THD Analysis in Closed-Loop Analog PWM Class-D Amplifiers

P. Amiri; M. Kohestani; M. Seifouri

Volume 2, Issue 1 , January 2014, Pages 1-5


  In this paper, we investigate the parameters affecting Total Harmonic Distortion (THD) and Power Supply Rejection Ratio (PSRR) in PWM Class D Amplifiers (CDAs) on the basis of linear models with feedback. From our mathematical analysis, we show that the THD of a PWM Class D amplifier with feedback can ...  Read More

Original Research Paper
A-New-Closed-form-Mathematical-Approach-to-Achieve Minimum Phase Noise in Frequency Synthesizers

S. SamadiGorji; B. Zakeri; M.R. Zahabi

Volume 2, Issue 1 , January 2014, Pages 7-13


  The aim of this paper is to minimize output phase noise for the pure signal synthesis in the frequency synthesizers. For this purpose, first, an exact mathematical model of phase locked loop (PLL) based frequency synthesizer is described and analyzed. Then, an exact closed-form formula in terms of synthesizer ...  Read More

Original Research Paper
Control‌-Strategies-for-Performance-Assessment-of-an- Autonomous Wind Energy Conversion System

M.R. HojatyDana; M.R. AlizadehPahlavani

Volume 2, Issue 1 , January 2014, Pages 15-20


  Renewable energy sources like wind, sun, and hydro are considered as a reliable alternative to the traditional energy sources such as oil, natural gas, or coal. This paper describes modeling and simulations to determine a method for the power performance evaluation of autonomous wind turbine system. ...  Read More

Original Research Paper
DALD:-Distributed-Asynchronous-Local-Decontamination Algorithm in Arbitrary Graphs

M. Rahmaninia; E. Bigdeli; M. Zaker

Volume 2, Issue 1 , January 2014, Pages 21-27


  Network environments always can be invaded by intruder agents. In networks where nodes are performing some computations, intruder agents might contaminate some nodes. Therefore, problem of decontaminating a network infected by intruder agents is one of the major problems in these networks. In this paper, ...  Read More

Original Research Paper
Optimum Design of a SRM Using FEM and PSO

M. Ranjkesh; E. FallahChoolabi; M. Pourjafari

Volume 2, Issue 1 , January 2014, Pages 29-35


  Nowadays the use of the Switched Reluctance Motors (SRMs) has been considerably increased in various home and industrial applications. Despite of many advantages of this type of motors, such as simple structure, low cost, and high reliability, the main disadvantage of them is the generation of high torque ...  Read More

Original Research Paper
The Application of Multi-Layer Artificial Neural Networks in Speckle Reduction (Methodology)

M.R. Pishgoo; M.R. N. Avanaki; R. Ebrahimpour

Volume 2, Issue 1 , January 2014, Pages 37-42


  Optical Coherence Tomography (OCT) uses the spatial and temporal coherence properties of optical waves backscattered from a tissue sample to form an image. An inherent characteristic of coherent imaging is the presence of speckle noise. In this study we use a new ensemble framework which is a combination ...  Read More